JPH0241475A - Base fabric for paraglider - Google Patents

Abstract

PURPOSE:To obtain the title lightweight base fabric of high tear strength with low water absorptivity, surface smoothness, weatherability and dyeability by pretreatment of a cloth comprising a cation-dyeable polyester fiber with a specific polysiloxane resin followed by coating with a polyurethane resin. CONSTITUTION:A cloth comprising a cation-dyeable polyester fiber is pretreated with a both-terminated polysiloxane resin followed by coating with a polyurethane resin or polysiloxane-modified polyurethane resin. Said polysiloxane- modified polyurethane resin can be prepared by reaction between a polysiloxane with both the ends substituted by hydroxyl groups (pref. straight chain polysiloxane 500-5000 in molecular weight) and a combination of polytetramethylene ether glycol with organic diisocyanate.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a base fabric for a paraglider or spinnaker.

<Prior Art> Paragliding has recently become explosively popular due to the fact that anyone can fly easily and the ability to climb a mountain, reach the top, and then fly back down the mountain. The first characteristic required of barracliders and the like is safety, which is a matter of maintaining strength over time, such as sewing strength and tearing strength of the base fabric for paragliders. Second, it is lightweight. This is to improve flight performance and to make it easier to carry. The third characteristic related to lightness is that when wet with rain, the weight does not increase due to water absorption (low water absorption).

Other required properties include surface smoothness and weather resistance.

It has color fastness, dimensional stability, etc.

Paragliders have traditionally been known exclusively as parachutes. It is generally well known that nylon fibers are used throughout the parachute (
JP-A No. 54-49799). Also, common commercially available products include nylon fabrics treated with resin, and weather-resistant polyurethane resin is used as the resin.

However, as mentioned above, the basic characteristics required for paragliders etc. are high strength and light weight, but practical products that have both of these characteristics have not yet been obtained, but they are still too heavy and heavy to be carried. Since it is a lid, it is not easy to carry it over long distances or high places. That is, in order to ensure high strength (stability), a certain degree of fineness or weave density is required, but if the fineness or weave density is increased, the weight will inevitably increase.

Furthermore, when the nylon base fabric used as the fabric for paragliders becomes wet due to rain or dew, it absorbs water and increases in weight, becomes partially stretched and wrinkled, impairs smoothness, and reduces flight performance.

On the other hand, when a polyester fabric dyed with a disperse dye is used as a base fabric, if it is left in a high temperature and humid state or a wet state for a long time, the hue shifts to dyeing, that is, transfer sublimation occurs, which significantly reduces the commercial value.

<Object of the Invention> The present invention has been made to solve this problem. That is, the object of the present invention is to provide a base fabric for paragliders that is lightweight, has high tear strength, has low water absorption, and also has surface smoothness, weather resistance, and color fastness.

<Structure of the Invention> That is, the present invention provides: 1) a base fabric for a paraglider, which is prepared by pretreating a polyester fabric containing cationically dyeable polyester fibers with a polysiloxane resin having hydroxyl groups at both ends, and then coating it with a polyurethane resin;

2) A base fabric for a paraglider comprising a polyester fabric containing cationically dyeable polyester fibers coated with a polysiloxane-modified polyurethane resin. ”.

Here, the cationic dyeable polyester fiber is one obtained by modifying the polyester fiber by introducing a third component, such as 5-sulfoisophthalic acid, into the polyester to serve as a dyeing seat for the cationic dye.

The fabric is a polyester fabric containing cationically dyeable polyester fibers, but may also be a fabric consisting only of cationically dyeable polyester fibers. The fibers constituting the fabric include single yarn fineness of 0.5 to 20 denier, total fineness of 10 to 50 denier,
It is preferable to use fibers with a strength of 4 g/d or more.

In order to maintain lightness and high strength, it is preferable to use a ripstop structure for the structure of the fabric.The fabric is preferably pretreated with a polysiloxane resin with hydroxyl groups at both ends and then coated with a polyurethane resin or coated with a polysiloxane-modified polyurethane resin. Cover with

Both terminal hydroxyl group polysiloxane modified polyurethane resin is
It can be obtained by reacting polysiloxane having hydroxyl groups at both ends with polytetramethylene ether glycol (PTMEG) and an organic diisocyanate. The molecular weight of the polysiloxane used is preferably a linear one having a molecular weight in the range of 500 to 5,000.The softening point of the polysiloxane modified polyurethane resin with six hydroxyl groups at both terminals is preferably in the range of 50 to 150°C. The coating can be done using a conventional coating method. The thickness of the resin layer is preferably in the range of 2 to 50 microns; if the grooves are less than 2 microns, the ventilation prevention properties are insufficient. 5
If it exceeds 0μ, the lightness will be impaired.

<Effect of the invention> 1. The base fabric of the present invention has greatly improved tear strength.

Therefore, since fine denier yarn can be used to maintain practical strength that guarantees safety, the overall weight of the base fabric can be reduced.

2. Even when the base fabric of the present invention becomes wet with rain or dew, it does not easily absorb water and its weight does not change much, so it does not impair flight performance.

It also has excellent weather resistance and can withstand long-term use.

3. Even when the fabric is left in a hot, humid or humid state for a long time, there is little transition from dark to light colored areas of the fabric, and the product value does not decrease.

<Example> The method for manufacturing the base fabric for a paraglider of the present invention will be specifically explained below with reference to Examples.

The measurement method for performance evaluation is as follows.

(1) Tear strength crab JIS L-1096-1979 pendium method (2) Tensile strength crab JIS L-10
96-1979 strip method (width 5 cxn) (3) Evaluation of weather resistance performance: The tear strength was measured after irradiation for 100 hours using a JIS L-0824 carbon arc lamp type light resistance tester.

(4) Color fastness test against sublimation during storage: JIS
The treatment was carried out according to the method specified in L-0854, but the treatment time and temperature were as follows.

Processing temperature: 70℃±2℃ Processing time: 15 hours Treatment humidity: Two-row property with 20% RH and 90% RH.

Dyeing treatment conditions> Example 1 A cationic dyeable polyester fiber with a single yarn fineness of 2.5 denier and a total fineness of 40 denier was used to produce an M fabric with a weave density of 134 yarns/inch in the warp direction and 116 yarns/inch in the weft direction. Created.

The fabric is continuously scoured in a conventional manner (processing temperature: 95
℃, processing time 2 minutes), preset was applied, and dyeing was carried out using a liquid flow circulation dyeing machine according to the recipe shown below.

Then, dry it in a dryer at 120°C for 1 minute.

Next, coat with resin liquid of the following formulation, and then
Heat treated at ℃ for 45 seconds 6 (Resin liquid formulation) Part 1 (Example 1) Pretreatment Asahi Guard 610 10 minutes (Asahi Glass vA) (Perfluoroacrylate) Boron Coat E 5 (Shin-Etsu Chemical @) (Silicon compound) Cat PC (Organic metal salt catalyst) 0.05 [Cat PD (Coupling agent) Mineral turpentine post-treatment 0.05 (Crisbon 2116E1 100 parts (Dainippon Ink (aliphatic polyurethane) Chemical Industry ■) Burnock DN950 3 (Hexamethylene diisocyanate) Dimelformamide 10 total
The performance of the fabric obtained in 193 parts was as shown in Table 1.

Grain Ratio Example 1 A woven fabric having the same weaving density as in Example 1 was prepared using polyester fibers having a single yarn fineness of 2.5 denier and a total fineness of 40 denier. Then, scouring and presetting were performed under the same conditions as in Example 1, and dyeing was performed using the recipe shown below.

Part 2 (Example 2) 100 parts of polyurethane resin modified with polysiloxane having hydroxyl groups at both ends Coronate (Compound of hexamethylene diisocyanate 1~ and trimethylolpropane) Toluene and then drying at 120°C for 1 minute.

Next, under the same conditions as Example 1, Example 1. Part 2 Coating was carried out using the resin formulation of Part 3 below (Comparative Example 1
~3).

The performance of the obtained fabric was as shown in Table 1.

(Prescription of 111 fat liquid) Part 3 Crisbon 2116 [L 100 @ Hannok DN950 3 Ratio Example 4 Using polyamide fibers with 2.5 denier between single yarns and a total fineness of 30 denier, 146 fibers/inch in the warp direction, Latitude direction 1
11i1i0J with a weave density of 22 threads/inch was produced.

After presetting the fabric in the usual way, it was scouring dyed with a Jaguar dyeing machine, and then dyed with a non-touch dryer for 12 hours.
It was dried at 0°C for 1 minute. Next, it was dyed and coated using the following recipe, and heat treated at 150°C for 45 seconds.

Dyeing treatment conditions> (Formulation of v!4 fat liquid) Part 1 (Comparative example 4) Pre-treatment Poron coat E at PC at PD Mineral turpentine post-treatment Crisbon 2116EL Burnock DN950 Dimethylformamide 5 (Shin-Etsu Chemical ■) 0.05 (, 11) 0.05 (u) 100 (u 1 100 parts Part 2 (comparison ρJ5) 100 parts of polysiloxane modified Bow urethane resin with hydroxyl groups at both ends Coronate H [Toluene dimethylformamide 10 total
The performance of the fabric obtained by 193 parts was the first
It was as shown in the table.

hand Continued Supplementary Positive book November P day, 1986

Claims (2)

[Claims] (1) A base fabric for a paraglider, which is prepared by pre-treating a polyester fabric containing cationically dyeable polyester fibers with a polysiloxane resin having hydroxyl groups at both ends and then coating it with a polyurethane resin. (2) A base fabric for a paraglider, which is made by coating a polyester fabric containing cationically dyeable polyester fibers with a polysiloxane-modified polyurethane resin.